Provided is an air conditioner. The air conditioner including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion device includes a supercooling device for supercooling a refrigerant condensed in the outdoor heat exchanger or the indoor heat exchanger, an injection pa
Provided is an air conditioner. The air conditioner including a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion device includes a supercooling device for supercooling a refrigerant condensed in the outdoor heat exchanger or the indoor heat exchanger, an injection passage through which the refrigerant passing through the supercooling device is introduced into an injection inflow part of the compressor, a bypass passage extending from the injection passage to a suction part of the compressor to bypass the refrigerant, and a passage opening/closing part disposed in at least one of the injection passage and the bypass passage to selectively block a flow of the refrigerant.
대표청구항▼
1. An air conditioner comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion device, the air conditioner comprising: at least one supercooling device that supercools a refrigerant condensed in the outdoor heat exchanger or the indoor heat exchanger;at least on
1. An air conditioner comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, and an expansion device, the air conditioner comprising: at least one supercooling device that supercools a refrigerant condensed in the outdoor heat exchanger or the indoor heat exchanger;at least one injection passage through which the refrigerant passing through the at least one supercooling device is introduced into an injection inflow port of the compressor;a bypass passage that extends from the at least one injection passage to a suction port of the compressor to bypass the refrigerant;a branch provided at the at least one injection passage to guide the refrigerant from the at least one injection passage to the bypass passage; andat least one valve disposed in at least one of the at least one infection passage or the bypass passage to selectively block a flow of the refrigerant, wherein the at least one valve comprises a first valve disposed in the bypass passage to selectively restrict suction of the refrigerant into the suction port and a second valve disposed in the at least one injection passage to selectively restrict injection of the refrigerant into the injection inflow port, wherein the second valve is disposed between the branch and the injection inflow port of the compressor and the first valve is disposed between the branch and the suction port of the compressor, and wherein in a first operation mode, the first valve is opened and the second valve is closed such that the refrigerant flows from the at least one supercooling device into the bypass passage from the at least one injection passage and is introduced into the suction port, and in a second operation mode, the first valve is closed and the second valve is opened such that the refrigerant flows into the injection inflow port through the at least one injection passage. 2. The air conditioner according to claim 1, wherein the at least one supercool device comprises first and second supercooling devices disposed between the outdoor heat exchanger and the indoor heat exchanger. 3. The air conditioner according to claim 2, wherein the first operation mode comprises a cooling operation, and wherein one-stage compressed refrigerant introduced into the suction port of the compressor is mixed with a refrigerant injected from the second supercooling device and is compressed in two stages in the compressor when the air conditioner performs the cooling operation. 4. The air conditioner according to claim 2, wherein the second operation mode comprises a heating operation, and wherein when the air conditioner performs the heating operation, one-stage compressed refrigerant introduced into the suction port of the compressor is mixed with a refrigerant injection from the second supercooling device and is compressed in two stages in the compressor, and the two-stage compressed refrigerant is mixed with a refrigerant injected from the first supercooling device and is compressed in three stages. 5. The air conditioner according to claim 2, wherein the at least one injection passage comprises: a first injection passage through which a refrigerant passing through the first supercooling device is injected into a high-pressure side of the compressor; anda second injection passage through which a refrigerant passing through the second supercooling device is injected into a low-pressure side of the compressor. 6. The air conditioner according to claim 1, wherein the first operation mode is a cooling operation mode, and the second operation mode is a heating operation mode. 7. The air conditioner according to claim 1, further comprising a passage switch that alternates a flow direction of the refrigerant based on whether the first operation mode or the second operation mode is being performed. 8. The air conditioner according to claim 1, wherein the expansion device further comprises a first expansion device adjacent to the outdoor heat exchanger, and a second expansion valve adjacent to the indoor heat exchanger. 9. A method for controlling an air conditioner, the air conditioner comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, an expansion device, at least one supercooling device that supercools a refrigerant condensed in the outdoor heat exchanger or the indoor heat exchanger, at least one injection passage that extends from the at least one supercooling device to an injection inflow port of the compressor, and a bypass passage that extends from the at least one injection passage to a suction port of the compressor, the method comprising: recognizing whether a cooling or heating operation of the air conditioner is performed; andinjecting a refrigerant discharged from the at least one supercooling device into the injection inflow port of the compressor by closing a first valve installed in the bypass passage and opening a second valve installed in the at least one injection passage when the air conditioner performs the heating operation, and suctioning a refrigerant discharged from the at least one supercooling device into the suction port of the compressor by opening the first valve and closing the second valve when the air conditioner performs the cooling operation. 10. The method according to claim 9, wherein the refrigerant is compressed in two stages in the compressor when the air conditioner performs the cooling operation, and the refrigerant is compressed, into three stages in the compressor when the air conditioner performs the heating operation.
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이 특허에 인용된 특허 (5)
Igor Vaisman CA, Capacity control of refrigeration systems.
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